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Use wire to make send and receive pins shorted
The L293B can be used as DC motors driver (control speed and direction)
Arduino example and how to connect
The 74HC154 decoders accept four active HIGH binary address inputs and provide 16 mutually-exclusive active LOW outputs
This module is plug and play
Temperature Humidity Sensor Module(DHT11) sim900a Use wire to make sendThis module includes a DHT11 Temperature & Humidity Sensor. It features a temperature & humidity sensor complex with a calibrated digital signal output. By using the exclusive digital signal acquisition technique and temperature & humidity sensing technology, it ensures high reliability and excellent long term stability. Pin Connection Connect the + pin to 5v and pin to GND, Signal pin will output the temperature and humidity information. If you are